This analysis finds photon indistinguishability errors in quantum measurements, suggesting improved methods for characterizing single-photon sources.
We present a method to extract the photon indistinguishability error from Hong-Ou-Mandel interference measurements, accounting for the combined effects of loss and multiphoton noise that contaminate the single-photon Hilbert space. Our analysis resolves apparent inconsistencies in previous interpretations of such measurements. The reported method applies to a wide range of single-photon sources, including quantum dots.
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Somhorst et al. (2025) studied this question.
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